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Combinations of these life history traits and life events create the life history strategies. As an example, Winemiller and Rose, as cited by Lartillot & Delsuc, propose three types of life history strategies in the fish they study: opportunistic, periodic, and equilibrium. [ 13 ]
Organisms whose life history is subject to r-selection are often referred to as r-strategists or r-selected. Organisms that exhibit r -selected traits can range from bacteria and diatoms , to insects and grasses , to various semelparous cephalopods , certain families of birds, such as dabbling ducks , and small mammals , particularly rodents .
Opportunism or "opportunistic behaviour" is an important concept in such fields of study as biology, transaction cost economics, game theory, ethics, psychology, sociology and politics. Etymology [ edit ]
Winemiller's early research on the life history of fish species resulted in the development of the triangular continuum, or E-P-O (Equilibrium-Periodic-Opportunistic) model. The model arose from an analysis of reproductive traits and demographic parameters using his own field-derived datasets and data compiled via review of hundreds of articles ...
Circular dendrogram of feeding behaviours A mosquito drinking blood (hematophagy) from a human (note the droplet of plasma being expelled as a waste) A rosy boa eating a mouse whole A red kangaroo eating grass The robberfly is an insectivore, shown here having grabbed a leaf beetle An American robin eating a worm Hummingbirds primarily drink nectar A krill filter feeding A Myrmicaria brunnea ...
The roadrunner is an opportunistic omnivore. Its diet normally consists of insects (such as grasshoppers , crickets , caterpillars , and beetles ), small reptiles (such as lizards and snakes , including rattlesnakes ), [ 15 ] rodents and other small mammals , spiders (including tarantulas ), scorpions , centipedes , snails , small birds (and ...
Image source: The Motley Fool. Unum Group (NYSE: UNM) Q4 2024 Earnings Call Feb 05, 2025, 8:00 a.m. ET. Contents: Prepared Remarks. Questions and Answers. Call ...
A generalist species is able to thrive in a wide variety of environmental conditions and can make use of a variety of different resources (for example, a heterotroph with a varied diet).